Ocean pH and the Fate of the Food Chain

An excess of CO2 is having an unforeseen effect on shelled undersea creatures

Coral Reefs: Are among those endangered by the drop in pH Justin Wong

Global warming is far and away the symptom at the top of the list of indicators that our planet is overloaded with carbon dioxide. Another important, but less considered consequence of the excess CO2 is the effect it has on the world's oceans. The oceans are a natural carbon dioxide sponge, responsible for maintaining the balance of CO2 in the atmosphere by absorbing a measure of the gas in its water. Currently, it is estimated that the ocean is uptaking nearly one-third of all human-produced CO2, which is slowly lowering its overall pH. Put simply: the oceans are becoming acidic. That's bad news for a lot of organisms, but those that produce shells are likely to be the first and hardest hit.

Oceanic animals that make shells by and large use calcium carbonate to build them. In a healthy ocean, CaCO3 ions are present in surface waters at tremendous concentrations, a concept known as supersaturation. When the water becomes more acidic, it is less able to hold the ions and so the concentration becomes under-saturated. That means animals will have to use proportionally more energy to build their shells, which will likely mean they have little left to find food and reproduce.

We've known that the oceans are headed in this direction, but we didn't previously realize it was happening as quickly as it now appears to be, as a new paper in Science is reporting. This rapid acceleration could have devastating effects on the underwater food chain, something so complex we are at a loss to predict the potential extent completely.

Via The Guardian

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Well, what do you know, its another step to the end of life as we know it...here's an idea people, go green. The Earth is falling apart.

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its sad to know that some people still dont belive in global warming and it churns my stomach and even if this isnt exactly global warming, its the same gas, and the same effect, the earth is hurting. yet, whats amazing, is that if every single human being recycled all their paper, we would never have to cut down another tree. and even if if we still recycled like 75% of papaer and had 25% new, that would help put c02 back in the ground,l or better yet, have forests were the bottom are covered in water, then when the tree falls, the c02 captured in the tree lifetime would be passed into the water and ultimatly the ground, that actually how most coal and oil came to be millions of years ago.

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its sad to know that some people still dont belive in global warming and it churns my stomach and even if this isnt exactly global warming, its the same gas, and the same effect, the earth is hurting. yet, whats amazing, is that if every single human being recycled all their paper, we would never have to cut down another tree. and even if if we still recycled like 75% of papaer and had 25% new, that would help put c02 back in the ground,l or better yet, have forests were the bottom are covered in water, then when the tree falls, the c02 captured in the tree lifetime would be passed into the water and ultimatly the ground, that actually how most coal and oil came to be millions of years ago.

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its sad to know that some people still dont belive in global warming and it churns my stomach and even if this isnt exactly global warming, its the same gas, and the same effect, the earth is hurting. yet, whats amazing, is that if every single human being recycled all their paper, we would never have to cut down another tree. and even if if we still recycled like 75% of papaer and had 25% new, that would help put c02 back in the ground,l or better yet, have forests were the bottom are covered in water, then when the tree falls, the c02 captured in the tree lifetime would be passed into the water and ultimatly the ground, that actually how most coal and oil came to be millions of years ago.

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Artesian

from Toronto, ON

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The oceans of the world are alkaline, not acid.

The report on my imminent death is premature. I have been sloshing around in the basins on the crust for more than four billion years. I now cover nearly 71 per cent of the planet. Since the last ice age I have lifted myself out of the basin by 120 metres and scared the tribes of Noah to the higher ground. During deep time I became the universal solvent for the volcanoes and the clouds. I have taken up as much salt as required by local circumstances and sometimes give it back in hot shallows and desert areas of my world. I have given man the salt in his blood. Your CO2 output is infinitesimally small. I have absorbed as much gas as I need to maintain balance with the organic world within me and on land. The exchange is so peaceful that science calls it equilibrium. I can absorb more CO2, if the plants do not need it, and it does not give me acid imbalance. My pH will remain basic no matter what you say. These variations you measure have come and gone many uncountable times on the planet and your baseline is too small to know the truth. What you do not get is that warming of the oceans releases CO2 and other gasses from my water, while cooling my water allows me to take up CO2 in vast amounts to nestle with the other molecules in my coldest most remote realms. I can absorb all that man can produce because your impact is feeble compared to my capacity.
Please watch me with humility for you cannot change me. I am the ongoing sink for the planet, and I am huge and my heat content is beyond your estimation. Measure me here and there with your microscopes but know that I will never be that way in that place again. Open your mind to the infinite cycles of chemistry and physics and kneel on my beach. You can only hurt me by not respecting my infinite ability to change chemistry and temperature in all the corners of the seas. My CO2 feeds your plants and your plants provide all the oxygen you breathe. Your base line is infinitesimally small yet your mouth is wide open.

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O come on lets just give up on the earth and go restart mars. All we need to do to make it another earth is what we are already good at: pollute it with lots of CO2 to make a atmosphere. Theres even a popsci article:
(its there i just cant find it, someone help me out!)

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Luke,
Trees / forests wont grow "were the bottom are covered in water" becuase their roots would be suffocated by too much water. Also, "when the tree falls, the c02 captured in the tree lifetime would be passed into the water" won't work either. It doesnt matter if the CO2 would go into the water. It would just rise to the surface and "evaporate" into the air. A fallen tree would have to be covered with several feet of earth to be sequestered.

And most coal and oil was created after plant and animal matter was buried and crushed under millions of tons of rock above it for millions of years. When trees and animals died in the Pleistocene, they gave up their C02 and other gases to the atmosphere.

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Well go figure the world id falling apart. It seems that on far too much of a consistant basis mankind ignores its lessons from the past and you would think by now that if a 3 year old can understand the concept that if you do something bad bad things are bound to happen why cant our politicians? We use and abuse all of our resources and make it a point to yell at everyone else for not going green and yet why dont i see solar pannels on multiple houses of the "green protestors" as oppose to there 1080i HD t.v. on there wall or there new corvete? Granted im not one of the people who makes a point to jar every one of my flatulations to limit global warming but i am looking into a $17,000 windmill that could power my entire house all the time and even durring outages and to top it all off i would get paid...yes i said paid by the county for being more energy conservant. The fact is were slowly but shurely letting our planet go to waste, the answer isnt to infest another planet because gosh darnit i like our planet, The answer is learn from our mistakes and have the common courtesy to make the planet liveabe for our children. On the other hand "save a tree use an owl as toilet paper"
~Taio~
~Taio~

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